<style type="text/css">
  .item:hover
  {
   background-color: Gray;
   cursor:pointer;
  }
  .show
  {
   width: 200px;
   z-index: 10;
   display: block;
  }
  .hidden
  {
   width: 200px;
   z-index: 10;
   display: none;
   border:1px solid rgb(80,160,91);
   border-top:none;
  }
  table tr td
  {
   margin:none;
   padding:none;
   border:none;
  }
 </style>